Sidney

/SID · nee/

Meaning

“Unknown”

English surname-turned-given-name, from Saint-Denis, a French place name.

Nicknames

sid

Vibe

gentle

How it ages.

Has a classic Englishness about it but feels slightly old-fashioned today, due for a quiet revival.

Used for both boys and girls; the gender-neutral appeal may help it grow again in the UK and Australia.